<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <h1>{{msg}}</h1>
        <h2>{{ weather.today }}</h2>
        <ul>
            <li>{{ life[0] }}</li>
        </ul>
    </div>
    
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
    <script>
        var app = new Vue({
            el:'#app',
            data:{
                msg:'hello',
                weather:{
                    today:'sun',
                    tomorrow:'cloudy'
                },
                life : ['happy','upset','smeil']
            }
        })
    </script>
</body>
</html>